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Old 11-02-2019, 10:38 PM #1
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Resistance numbers for the IAC

Hi all,

I’ve recently had an issue with high idle, 1000rpms.

I found a post over on Yota Tech that states the resistance value for the IAC should be between 21 and 25 ohms. The reading I got was 19. Is there someone who has a FSM that can tell me what is an acceptable number?

I don’t want to start throwing parts at this.

Thanks,
Scott
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Old 11-03-2019, 01:22 AM #2
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On my 2000 fsm I got:
Cold - 17-25 ohms
Hot - 21.5-29.5 ohms

Cold = 14-122f iac coil temp
Hot = 122-212f iac coil temp
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Old 11-03-2019, 02:17 AM #3
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Originally Posted by T4Rscott View Post
Hi all,

I’ve recently had an issue with high idle, 1000rpms.

I found a post over on Yota Tech that states the resistance value for the IAC should be between 21 and 25 ohms. The reading I got was 19. Is there someone who has a FSM that can tell me what is an acceptable number?

I don’t want to start throwing parts at this.

Thanks,
Scott
I couldn't find the iac resistance values on my 3rd Gen fsm but I had a document for a 5vz-fe 2000 tacoma. hope it helps
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Old 11-03-2019, 02:32 AM #4
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here is second page
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Old 11-03-2019, 07:35 PM #5
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Have you tried cleaning it first?
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Old 11-04-2019, 09:17 PM #6
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Well, after putting in about an hour of testing voltage and resistance, I believe I found my issue.

When I first took my resistance cold, it registered 19.3 ohms. When I took it again hot, it came up 0.00 on my meter. I removed the coil from the valve itself and it moved freely. At that point I checked resistance again, it it was still 0.00.

Now to find a deal on an IAC.........

Thanks to all!
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Necessity is the mother of invention.
Recent studies have shown that aggressive therapy combined with owning Toyotas, can be affective in breaking the cycle of Jeep addicition.
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